The only way I have been able to attach pictures is by going into them and selecting send, then selecting the ones I want to add to the email. For some reason if you go into email, then you want to compose, you can't add attachments. Mental IMO.
I must admit I haven't tried it on my iPad. A guy I work with had it in and came to me for help as he wanted to send his friend some pictures. He spent HOURS writing the email (literally) then couldn't work out how to attach. He brought it to me and I thought it would be straight forward, after a lot of head scratching I gave up and went to google where I found it couldn't be done with the stock email app. After faffing around with it some more I found that you could email pictures from the gallery, soooooo I copied the text from his email and then created a new email from the gallery selecting a number of pictures. When the email came up the pictures didn't show. If I selected a small amount (2 or 3) it was fine, but if I went with what he wanted (10) it just wouldn't show them.
Absolutely hopeless IMO. I'll be using it for viewing my emails, and the odd reply, but there is no way on earth this thing is a laptop replacement.
Thanks for the tip by the way, I'm off to try it